Calypso BTS: my phone my phone doesn't see my base station

Harald Welte laforge at
Wed Dec 14 00:00:32 UTC 2016


On Tue, Dec 13, 2016 at 11:26:05AM -0700, phreaker1983 wrote:
> hi guys, my phone doesn't see my base station.. To start I used :

How strong is your signal?  The initial sync of OsmocomBB is (as far as
I remmber) setting the AGC to an expected signal level of -85 dBm.  If
"your base station" (I assume it is not a public network, but a base
station you have on your desk / in your lab) is next to your phone, you
might have -45dBM or even more.  This will clip the signal.

Unfortunately in all the 6 years of OsmocomBB, nobody voluntered to
address any of those long-standing issues or lacking features.  It
continues to sadden me that despite all the efforts that people like
Dieter, Andreas, Sylvain and I have put into implementing the first >=
80%, the rest of the community and user base has not managed to address
those remaining parts.  The AGC handling for initial sync is one part,
and the re-sync to neighbor cells (as requirement for hand-over) is
another of those key parts.

- Harald Welte <laforge at> 
"Privacy in residential applications is a desirable marketing option."
                                                  (ETSI EN 300 175-7 Ch. A6)

More information about the baseband-devel mailing list